HR: 1340h
AN: A53C-1354    [Abstracts]
TI: Long-range transport of polycyclic aromatic hydrocarbons (PAHs) from the eastern Asian continent to Kanazawa, Japan with Asian dust
AU: * Tamamura, S
EM: tamamura@eng.hokudai.ac.jp
AF: Graduate school of Environmental Science, Hokkaido University, Kita 10, Nishi 5, Sappro, Japan, Sapporo, 060-0810,
AU: Sato, T
EM: tomsato@eng.hokudai.ac.jp
AF: Graduate Scool of Engineering, Hokkaido University, Kita 13, Nishi 8, Sappro, Japan, Sappro, 060-8628,
AU: Ota, Y
EM: yukieota@eng.hokudai.ac.jp
AF: Graduate Scool of Engineering, Hokkaido University, Kita 13, Nishi 8, Sappro, Japan, Sappro, 060-8628,
AU: Wang, X
EM: xilong@psis.umass.edu
AF: Department of Plan and Soil Sciences, Stockbridge Hall, University of Massachusetts, Amherst, MA, USA, Amherst, 01003,
AU: Tang, N
EM: tou@p.kanazawa-u.ac.jp
AF: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-mach, Kanazawa, Ishikawa, Japan, Kanazawa, 920-1192,
AU: Hayakawa, K
EM: hayakawa@p.kanazawa-u.ac.jp
AF: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-mach, Kanazawa, Ishikawa, Japan, Kanazawa, 920-1192,
AB: Aerosol particles were collected for 1 year, starting in April 2003, in rural areas of Kanazawa, Ishikawa, Japan to understand the role of Asian dust as a long-range transporter of polycyclic aromatic hydrocarbons (PAHs). Three sampling intervals were designated in this study, namely: (1) Dust period 1 (March 11–19, 2003); (2) Dust period 2 (March 28, 2003–April 9, 2003); and (3) Dust period 3 (April 9, 2004–April 25, 2004). The Asian dust particles are predominantly in the coarse particle size range (2.1–11 ìm). PAH analyses were performed separately on both the coarse and fine (<1.1 ìm) particle ranges. Seasonal trends in PAH concentrations for coarse and fine particles showed that the Asian dust particles in Dust period 3 contained significant amounts of less-volatile PAHs such as benzo[a]pyrene (BaP) and benzo[g,h,i]perylene (BghiP). A kinetic model developed in this study shows that almost none of these PAHs would be accumulated on Asian dust particles in the atmosphere, due to their extremely slow adsorption rates. These PAHs would have to originate from PAH-polluted soil particles around industrialized areas. Back trajectory analyses suggest that the Asian dust in Dust period 3 came from loess regions around industrialized areas. This indicates that geologic materials play a significant role in the atmospheric circulation of PAHs.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting